DENVER (AP) – Labels on genetically modified foods have been rejected again by Colorado lawmakers.

A House committee unanimously rejected a voluntary measure to give food producers the option of labeling food that doesn’t include genetically modified ingredients. Lawmakers from both parties said there’s no obstacle to such labels without such a law.

Colorado voters could still see ballot measures to require labels on food items made or derived from genetically modified crops, known as GMOs. Currently, only Connecticut and Maine have laws requiring labels for genetically modified food.

Seventy percent of processed foods contain at least one GMO ingredient, according to the nonprofit Center for Science in the Public Interest.